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hello,

I an new in LabVIEW FPGA programing so I would appreciate any help. I am using sb-rio 9636 card and optocoupler for speed messaurment of DC motor. I have conected everyting right and the sensor is giving me date. But messauring the speed the oscilations of sensor data are huge. I am not changing the speed and motor continiousliy is rotating in the same speed but data are not the same. For example im 12 V that is the max speed motor schould rotate in 6500 rpm/min but in one second it is showing 6500 and in the other 5500 rpm/min.  think that there is not problem in the code but that the messaurment are not reliable. I will put my code. I need to know is there anz other way to do encoder readings.

 

Thank you

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http://forums.ni.com/t5/LabVIEW/Labview-FPGA-encoder-reading/m-p/3170149

Spex
National Instruments

To the pessimist, the glass is half empty; to the optimist, the glass is half full; to the engineer, the glass is twice as big as it needs to be has a 2x safety factor...
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